<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="UTF-8">
		<title>Document</title>
		<style type="text/css">
			table {
				width: 200px;
				/*border: 1px solid #eee;*/
				border-collapse: collapse;
			}
			th,td {
				border: 1px solid #eee;
			}
			.table2 {
				border-top: none;
			}
			.table2 tr:first-child td {
				border-top: none;
			}
		</style>
	</head>
	<body>
		<table>
			<tbody>
				<tr>
					<td rowspan="2">aa</td>
					<td>1</td>
					<td>2</td>
					<td>3</td>
					<td>4</td>
					<td>5</td>
				</tr>
				<tr>
					<td>1</td>
					<td>2</td>
					<td>3</td>
					<td>4</td>
					<td>5</td>
				</tr>
			</tbody>
		</table>
		<table class="table2">
			<tbody>
				<tr>
					<td rowspan="2">bb</td>
					<td>a</td>
					<td>b</td>
					<td>c</td>
					<td>d</td>
				</tr>
				<tr>
					<td>a</td>
					<td>b</td>
					<td>c</td>
					<td>d</td>
				</tr>
			</tbody>
		</table>
	</body>
</html>
